Furnace-wall structure



Sca-m. M925.

E. PACKARD FURNACE WALL STRUCTURE Filed Oct. 1, l924 3 Sheets-Sheet 2 A NORA/ swf., 1925. x msmm E. A. PACKARD FURNACE WALL S TRUGTURE Filed Colt. 1,1924' 3 Sheets- Sheet 5 .2 ZZ Z4 Y 2/0 2 Patented Sept. 8, 12925.

UNITED STATES PATENT OFFICE.

EDWIN A. PACKARD, OF YONKEBS, NEW YORK, ASSIGNOB T0 INTERNATIONAL COM- B USTION ENGINEERING CORPORATION, OF NEW YORK, N. Y., A. CORPORATION OF DELAWARE rURNAcE-WALL STRUCTURE.

Application illed October 1, 1924. Serial No. 740,918.

To all whom it may concern.'

Be it known that I, EDWIN A. PAoxARD, a citizen of the United States, residing at ,Yonkers, county of Westchester, State of New York, have invented a certain new and useful Improvement in Furnace-Wall Structures, of which the following is a full, clear, and exact description.

, My invention relates to furnace wall structures, and has special reference to structures of this character that are particularly adapted for use in furnaces of the radiant boiler tube type in which a part of the boiler tubes are arranged vertically adjacent the vertical side walls of the furnace, the lower portions of the tubes being env closed by the side Walls so as to protect them from the direct heat of the burning fuel.

An object of the invention is to provide a furnace wall structure of this character which is sim le, stron and durable in constructionan highly e cient.

Another object of the invention is to provide a novel and improved furnace wall structure.

With these and other objects in view, the features of the invention consists in certain constructions, arrangements and combinations ofl parts hereinafter described and claimed, the advantages of which will be obvious to those skilled in the art.

The several features of the invention will be clearly understood from the following description and accompanying drawings, in which:

Figure 1 is a vertical sectional view of a furnace wall structure embodying the features of the invention in their preferred form, the section being taken substantially online 1-1 of Fig. 4;

Fi 2 is a similar sectional view taken on the line 2-2 of Fig. 4;

Fig. 3 is an inner face view of a portion of the structure illustrated in Fig. 1;

Fig. 4 is a horizontal sectional view taken on the line 4.-4 of Fig. 1; p

Fig. 5 is a longitudinal sectional view taken onthe line 5 5 of Fig. 4;

Fi A. 6 is a view in perspective of'l a block of re ractory material forming a component part of the furnace wall struc/ture; L Fig. 7 is a view corresponding to Fig. l of a modified form, the section being taken onl Figs. 12 and 13 are vertical and horizontal sectional views, respectively, of another modified form of block.

, The furnace wall structure illustrated in the drawings is particular] ada ted for a furnace of the radiant boi er tu e type in which a part of the boiler tubes are arranged vertically over the inside of the walls of the furnace with the lower portions of the tubes enclosed by the walls so as to protect them from the direct heat and flame of the burning fuel. As shown the lower portion of the furnace wall structure is rovded with an outer wall section 2, an an inner wall section 4 having opposed grooved portions) forming openings which extend vertically therethrough and through which the vertical tubes 6 of the boiler extend, the

'portions of the tubes extending above said vided with two laterally projecting tongues 8 that are slpace'd a1 distance apart and spaced from t e vertical sides thereof. The tongues 8 are spaced midwa between the top andbottom sides of the lock, and the `portions of the block between the tongues 8 and the top and kbottom sides are recessed at 10 so as to form continuations of the 1ongitudinal sides of .the tongues. The inner or tongue side lof each block is provided with a grooved ortion 12 extending) between the top andp bottom sides of the lock and through the space between the tongues,

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and are further provided with correspondingly grooved portions 14 adjacent the outer si es of the tongue, each of the grooved portions 14 being substantially one-half of the width of the centrally grooved portion 12. The top and bottom longitudinal sides of each tongue `are inclined outwardly from each other and the end surface of Ieach tongue is curved convexedly in an arc struck from a horizontal center. As the blocks 0f the outer wall section are not subjected t0 the direct heat of the burning fuel as is the case with the blocks of the inner wall section, the former maybe I nade of inferior material. 'Ihe blocks of the two sections are preferably of the s'ame construction except that the portion of the sides ofthe blocks of the inner section extending from substantially the lane of the ends of the tongues of the bloc s of the outer section to their exposed faces, are inclined inwardly toward.

this layer of blocks are laid the lowermost blocks of the inner wall section, the blocks of the two layers being arranged in staggered relation so as to position the tongues of each block of the upper layer over the adjacent tongues of adjacent blocks of the lower layer, with the tongues of the blocks of one layer entering the corresponding recesses or sockets 10 of the other layer. The next layer of blocks of the outer wall section is laid upon the first thereof withV their tongues extending over the tongues of the layer of blocks of theJ inner wall section and the ends of the tongues entering the recees thereof. The remaining layers of blocks of the two sectlons may be correspondingly laid, the blocks of the several layers of each section being laid one directly above the other, so as to form vertical rows, and the rows of blocks of the two sections being arranged in staggered relation.

With the blocks ofthe two sections thus laid, the centrally grooved portions 12 of the several blocks of each vertical row of each Wall section are arranged in vertical alinement with each other and opposite to and spaced from the adjacent endgrooved portions 14 ofthe several blocks of adjacent rows of the other section, so as to provide the openings through which the boiler tubes extend. In laying the blocks a suitable lire clay 2 1 is employed upon which the blocks are laid.

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From the foregoing it will be apparent that a simple, strong and durable furnace lock with the tongues of two adjacent blocks of the other section insures the blocks being securely and firmly held together in a compact unitary structure that well protects the enclosed portions of the boiler ltubes from the direct heat of the burning fuel. The inclination of the adjacent sides of the inwardly projecting portions of the blocks of the inner wall section which is exposed to the direct heat of the burning fuel, permit the requisite degree of expansion and contraction without danger of injury to the blocks.

In the construction shown in Figs. 7 to 10, inclusive, -instead of the top and bottom sides of the tongues of the blocks being inclined as in the construction above described, the tongues are provided with enlarged squared ends 22 forming abrupt shoulders 24, and the blocks are further provided with correspondingly squared cut-away portions or sockets 26. lVitlrthis construction, when the blocks are assembled to form the sections, the shoulders 24 of the tongues of each block of one section interlocks with the shoulders of the tongues of the blocks of the other section. 1

In the construction shown in Fig. 11 and in Figs. 12 and 13, re-enforcing bars 28 are shown embedded in the blocks and extending into the tongues, so as to re-enforce them; the block shown in Fig. 11 corresponding to the blocks shown in Figs. 1 to 6, and the blocks shown in Figs. 12 and 13 corresponding to the blocks shown in Figs. 7 to 10, inclusive.

As will be evident to those skilled in the art, my invention permits various modifications without departing from the spirit thereof or the scope of the appended claims.

That Iclaim is:

1. A furnace wall structure having outer and inner wall sections, each made up o f a plurality of blocks of refractory materlal, the adjacent sides of the blocks of the two sections having interlocking portions integral therewith, respectively, and having opposed portions forming openlngs, said lnterlocking and said opposed portions belng constructed and arranged so that the ends of the interlocking portions of the blocks of each wall section project a distance beyond said opposed portions of the other wall section, and boller tubes extending through Said openings.

2. A furnace wall structure having outer I, through said openings, each of said blocks having a plurality of said projecting portions, and having said grooved portion thereof arranged between two of said projecting portions, said interlocking portions of the blocks of the two sections being of the same construction. 1

3. A furnace wall structure having outer and inner wall sections, each madel up of a plurality of rows of blocks la-rran d vertically side by side, the rows of b ocks of the two sections being arranged in staggered relation, and the adjacent sides of the blocks of the two sectionsfhaving interlockin portions arranged one upon the other an having opposed portions forming vertical openings, and boiler 'tubes extending through said openings.

4. A furnace wall struct-ure having outer and inner wall sections, each made up of a plurality of blocks, each block having an inwardly projecting tongue having an enlarged end, said tongue of each block of one section being in interlocking engagement with said tongues of two adjacent blocks of the other section, and the adjacent sides of the blocks of the two sections having opposed portions forming openings, and boiler tubes extending through sai/d openings.-

5. A furnace wall structure having outer and inner wall sections, each made up of a plurality of blocks, each block havin two inwardly projecting tongues arrange side by side and spaced apart, each tongue of each block of one section being in interlocking engagement with adjacent tongues of two adjacent blocks of the other section.

6. A furnace wall structure having outer and inner Wall sect-ions, at least one of which is made up of a plurality of blocks of refractory material, each Vof said blocks having two inwardly projecting tongues arranged side/by side and spaced apart, and arranged in interlocking engagement with the walls of recesses in the other section, the adjacent faces of said sections having opposed portions forlning openings, each opening extending between the tongues of one of the blocks, and boiler tubes extending through said-openings.

7. A furnace-wall structure having outer and inner Wall sections, each made up of a plurality of rows of blocks arranged vertically side by side, the rows of blocks of the two sections being arranged in staggered relation, each of the 'blocks having two projectingY tongues with each tongue of each bloc-k of one section arranged in interlocking engagement with adjacent tongues of two adjacent blocks of the other section, ,and the adjacent sides of the blocks of the two sections having opposed portions forming openings, each opening extending between the tongues of a row of blocks of one section, and boiler tubes extending through said openings.

8. A furnace wall structure having outer and inner wall sections, each made up of a plurality of blocks the adjacent sides of the blocks-of the two sections having interlocking portions and opposed portions forming openings, and the adjacent sides of the blocks of the inner wall section being inclined inwardly away from each other, and

boiler tubes extending through said openlugs.

9. A block of refractory material for a furnace wall structure having two horizontally projecting tongues having enlarged ends arranged side by side and lspaced apart and spaced from t-he vertical sides of the block, and having cut away portions adjacent the inner ends of the top and bottom longitudinal sides of the tongues and forming continuations thereof.

EDWIN A. PACKARD. 

